Arc-lamp.



J. J. WOOD.

ARC LAMP.

APPLICATION FILED SEPT. 23, 1910.

Patented Oct. 14, 1913.

Witnesses Tl STAR PAENT @FEEQ.

JAMES J. WOOD, OF FORT WAYNE, INDIANA, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ARC-LAMP.

Specification of Letters Patent.

Patented Get. 141, 1913.

To all whom it may concern:

Be it known that-I, JAMES J. W001), a citizen of the United States, residing at Fort Wayne, in the county of Allen, $tate of Indiana, have invented certain new and useful Improvements in Arc-Lamps, of which the following is a specification.

My invention relates to a device for yieldingly securing the globe of an arc lamp or other light-giving medium against a support or base plate, and has for its object an improvement ina device of this character.

For a fuller understanding of my invention reference may be had to the accompanying drawing, in which Figure 1 is a fractional perspective view of a. device showing the preferred form of my invention in which the globe is seated against the base plate, and Flg. 2 1s similar to Fig. 1, with the globe in the position which it occupies just prior to its being lifted into its final position.

In the drawings, 1 is a split corrugated ring secured about the top of the globe. The adjacent ends of the split ring 1 are provided with lugs 2, through which the thumb screw 3 passes and by means of which the corrugated ring may be yieldingly and securely fastened about the upper edge of the globe. The outer edge of the base plate 4 is provided with :1 lug 5 to whlch a yoke 6 is pivoted at. 7. The two parts of this.

yoke are provided with slots 8 through which a pin 9 passes. A depending hook 10 is provided with two upwardly extending arms secured to the pin 9 on either side of the yoke 6. One end of a looped spring 11 is fastened to the outer end of the yoke 6 and the other end of this spring is suitably fastened to the pin 9. Fig. 2 shows the depending hook 10 engagmg the tightening screw 3 in the positions which these parts occupy before the globe is drawn into final position, while Fig. 1 shows the parts when the globe is fastened .up agalnst the base plate. This fastenlng 1 s accomplished simply by lifting the spring 11 into the EOSltlOIl shown in Fig. 1 where it is held y a toggle action.

It will be understood that when the globe is lowered to trim the lamp, the hook 10 is released from the bolt 3 by slightly lifting the globe, and that the opposite side of the split ring 1 is provided with a hinge bywhich it is suspended from the base plate 4 as usual.

It will be seen that the slots 8 in the two members of the yoke 6 permit a certain amount of lost motion and thus provide for any unevenness in a given globe or any slight difi'erences that might exist in different globes, and thereby prevents breaking of the globe.

What I claim as new and desire to secure by Letters Patent of the United States, is,-

1. In combination, a support, an inclosing globe, a member secured to said globe, a U-shaped member,the legs of'which are pivoted to said support and provided with similarly arranged openings, a dependin latch mounted on a bar received in sai openings, and a leaf spring secured to said bar and said yoke, the U-shaped member being so arranged as to pass the dead center when lifted 1n position and said bar being adapted to be suspended within said openings whereby said globe is yieldingly 'held in position against said base.

2. In combination, a support, an inclosing globe, a member secured to said globe, a yoke pivoted to said base having elongated openings, a bar received in said openings and adapted to rest in one end of the opening when said yoke is lowered, a latch pivoted on said bar adapted to enga e said globe member, and a spring secured to said yoke and to said bar, the whole being so arranged that said bar is yieldingly suspended within said openings from said spring when said yoke is lifted.

In witness whereof, I have hereunto set myhand this 19th day of September 1910. 

